Ever Wondered How Long Could We Live if All Diseases were Miraculously Eliminated?

Death is an inevitable part all life. But what if we "cheat" on it?
Say we had a medical breakthrough that has removed all these "natural" causes- Cancer? Gone. Malaria? Nah. Heart attacks? Hah, don't even think about it.
How do you think would it affect human's life expectancy? How long would we live if the only causes of death are car accidents, drowning, assault by firearm, and the like- those that are outside of us?
Enter Polstats.com- a statistics website that is used to, well, have fun with statistics. And oh, it's also here to answer your question (the question)! The interactive visualization simulation of the site even allows you to see the life expectancy of 100 people, who are to die overtime due to just accidents, crime and disasters. (You can try it here!) And while it doesn't have any valid scientific claims, some of its methods are similar to professional epidemiology.
Dr Katherine Keyes, an Associate Professor of Epidemiology at Columbia University's Mailman School of Public Health, even confirmed that the basic technique Polstats' using is statistically sound, though the list of "unnatural" causes are incomplete. With this, the calculated average lifespan of a person is an impressive 8,938 years! Imagine the things you can do if you'll live that long!
"Trends in life expectancy are troubling right now in the US. The most recent analyses available indicate that for the first time we're seeing declines in life expectancy for some demographic groups, especially those at the lower end of the socioeconomic ladder," she said. There have been gains in life expectancy, but those have been almost exclusively confined to high socioeconomic status groups, so there's a widening disparity between the haves and the have-nots."
Now what I would want to see is the reverse of this; Ever wondered how long could humans live if everybody dies "naturally"?- If we only die due to diseases?
But then again...https://motherboard.vice.com/en_us/article/how-long-could-humans-live-if-all-diseases-were-cured